I hope David T. doesn't mind me reproducing this email he sent me (and
Frameworks) some years ago on this very topic. He wrote:
Take the lens out. There may be a screw holding it in at the back of
the barrel. Get the focus knob out of the lens housing (I can't
rememeber if the release is a screw or a button on the bottom of the
housing...). Remove all residue from the end of the knob, and
thoroughly clean the hole in the housing where the knob goes (you may
have to take the housing off the projector...).
Heat shrink tubing doesn't shrink that much. I fixed our Eiki by using
three or four layers, and that meant three or four diameters. I used
an inexpensive kit of wider gauge tubing from Harbor Freight tools.
http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=96024
You can get this online, or they have a retail stores, including one
in east Columbus. So first I cut a small section of the narrowest
white tubing to fit the business end of the shaft. I used kitchen
matches as a heat source to shrink the tubing, moving the match up
toward the tube so it would start shrinking but not so close it would
burn. Then, the next wider size in the kit is red and finally black. I
think if you can get more than one layer with any of the sizes you
should, but when the tubing doesn't stretch out, so once what you're
trying to put it over gets to a certain diameter you can't get it on,
and you have to go up to the next size. It's been awhile, so i don't
remember exactly how many layers I wound up with or what the exact
composition of white red and black was.
Trim the far end of the layered tubing with an X-Acto knife if
necessary, so the knob goes back into the housing readily and turns
properly. (It's hard to cut the little pieces of tubing to exactly the
right length before you put them on the shaft.)
Jonathan again: I've also heard, from Alain LeTourneau, truly a master
of 16mm, that rubber O rings work for this. He wrote: "Buy a bunch
with difference compound densities and see what works best."
I've tried both on my poor Eikis and had good results.
Jonathan
On Apr 14, 2012, at 12:53 PM, graeme hogg wrote:
This questions no doubt been asked before but does anyone know the
best
material to replace the Elf/Eiki (black-brown and blue models, RT1
etc)
focus know spindle with once the rubber sleeve has perished.
--
http://www.bristol-channel.org/skomer
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Jonathan Walley
Associate Professor of Cinema
Denison University
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